<!DOCTYPE html>
<html>
<head>
<style>

.grid-container {
  display: grid;
  grid-template-columns: 30px 200px auto 100px;
  grid-gap: 10px;
  background-color: #2196F3;
  padding: 10px;
}

.grid-container > div {
  background-color: rgba(255, 255, 255, 0.8);
  text-align: center;
  padding: 20px 0;
  font-size: 30px;
}
</style>
</head>
<body>

<h1>grid-template-columns 属性</h1>

<p>请使用 <em>grid-template-columns</em> 属性来定义网格布局中每列的尺寸（宽度）。</p>
<p>这个网格布局有四列，带有不同的尺寸：</p>

<div class="grid-container">
  <div class="item1">1</div>
  <div class="item2">2</div>
  <div class="item3">3</div>  
  <div class="item4">4</div>
  <div class="item5">5</div>
  <div class="item6">6</div>
  <div class="item7">7</div>
  <div class="item8">8</div>
  <div class="item8">9</div>
</div>

</body>
</html>
